Barrier

Barrier is a combat mechanic introduced in the Guild Wars 2: Path of Fire expansion. It creates a health barrier that takes damage prior to the health bar. Barrier decays after 2 seconds, taking 3 seconds to fully decay. Re-applying Barrier will stop the decay while keeping the current amount, allowing large amounts of Barrier to build up with quick skill usage. The amount of barrier generated is based on the source's healing power, and is capped at 50% of the recipient's maximum health.

Similar to healing, the barrier total a skill applies can be calculated using the following formula: